Fluid-handling apparatus



Dec. 23, 1930. R. H. OWENS 1,785,842

` FLUID HANDLING APPARATUS Fild July 51, 1926 3 ShBBtS-Sheet l Dec. 23,1930. R. H. owl-:Ns 1,735,842

FLUI D HANDL I NG APPARATUS Filed July 3l, 1926 5 Sheets-Sheet 2 7J yaJ7 /af @than muy;

Dec. 23, 1930. R. H. OWENS FLUID HANDLING APPARATUS 3 Sheets-Sheet 3Filed July' 31, 192e WH-OWMJ miv aucun* Patented Dec. 23, 1930 UNITEDSTATES ,PATENT Nori-ICE y ROIZISllfKJIlI OWENS, 0F CONNERSVILLE,INDIANA, ASSIGNOR TO THE P. H. @a F. 1M. *i `ROOTS COMPANY, OFCONNERSVILLE, INDIANA, A CORPORATION OF INDIANA FLUIDfHANDLING APPARATUSapplication sied July 31,

This invention relates to fluid-handling apparatus,y and particularlytoa fluid meter. 'One 'of the principal objects of this inventionlistoprovide fluid handling apparatus whichis reliable,eiiicient, easily'assembled, and'readily maintained in operating condition. y. f ,"Anotherobject of'this invention is to provide rotary fluid-handling apparatus,such .i vvas a gas meter, in whichthe rotary members arey supported inbearings which are constructed to preventfthefpassage thereinto ofobjectionable foreign matter.

f Still4 another'object of this invention is T tof providefluid-'handling apparatus of this character-having improved mechanismfor manualoperation, for starting'and the like. Other objectsandadvantages of the pres ent invention will be apparent from the folau"lowing description when taken in connection v. withthe accompanymgdrawing.

` Iii-the drawing inwhich like characters of reference designate likeparts throughout the several views thereof,

' j Fig. 1 is a 4sideelevationof -a fluid meter constructed inaccordance with this invention" V i Fig. 2 is an end'elevation of theapparatus disclosed in Fig. v1, with the cover plate for the gearhousing removed, when viewed from .they righthand end of the meter;

' Fig. 3 is a vvertioalsectional view through the gear housing and oneend of the impeller casingfftakeu along the line3-3 of Fig. 2; Fig. 4isa vert-ical sectional view through Aa portionof the manually operablecrankshaft, and mechanism associated therewith, along the line .4 4 ofFig. 3;

-f' Fig. is a vvertical sectional view through V.the apparatus of Fig.4, along the line 5--5;

and a Ai Fig. v6 Ais a vertical sectional view showing amoditied formofcounterldrive, and shaft fon manual operation. y

vvThe-device shown in the-drawing as illustratinga `preferred embodimentof the `invention is ofl'thewell-known rotary lobed impellerconstruction, of the widely-'known Roots` blower?? type; and asdisclosed is particularly adaptedufor they'metering of gases.

1926. Serial No. 126,317.

ignated generally by the numeral l0. This y casing is of generallyelliptical cross section, and has an opening at the'top adaptedl to re-Y ceive a topror coverl member 11, having a flanged opening 12, which isadapted for connection by means of bolts or any other suitable meanswith a gas supplying pipe, not shown. The'casing 10 also has an openingin the bottom, which is surrounded by a flanged portion 13. This flangedportion 13 is adapt ed to set upon the base member bed plate l5, whichhas'a suitable outlet passage 16 therein which connects with the loweropening in the casing, the impeller casing and base member or bed platebeing connected together by means of bolts or in any other suitablemanner. The passage 16 is adapted for connection to the gas` deliverypipe, and preferably the gas flows through the meter in a `downwarddirection, although this may be varied as desired. However, by havingthe gas flowing downwardly impurities are Inorev readily carried throughthe meter and not devposited therein with possible ensuing trou- Theimpeller casing 10 is open ended, and each end is provided with a heador end plate 20, each of which is provided with two openings 21 eachadapted to receivea shaft end. The openings 21 in the two end plates arearranged in alignment in pairs, to receive aligned shaft ends, each pairof shaft ends supporting a lobed impeller member, which is rotatablysupported within the impeller casing. If desired the end plates may bemade in sections. As shown they are made in two sections, beingdividedhorizontally along the line 23 through substantially the center of theopenings 21.

In the devicel illustrated the impellers are of the conventional lobedtype, and their con` 4 mediate its depth.

end plate.

each of which is mounted a. stub shaft 26, having an enlarged outer-'end27, which end fits freely in the cooperating opening 2l of the The.outer end of this enlarged portion of the stub shaft is provided with abearing receiving socket or bore 28 therein, which 'is provided with ashoulder 29 inter- This use of kstub shafts permitsY of considerablyreducing the .weight of'th'e impellers and this in turn vcuts down thepressure'differential necessaryfor effective operation as a meter.

a suitably formed portion 30 of the impeller casing` is a. standard orpillow bloc-k 3l, provided with suitablev grooves or passages 32 forreceiving theuends of shaft members 35,

lthere being a retaining cover or plate 36 bolted orrotherwise secured,to the pillow block for Vfirmly retaining each shaft member 35 inposition. As shown the portion of the pillow block which supports theshaft members 35 is of extended widthto give a firm and strongconstruction. The free endV of each shaft member 35 extends into thesocket or bore 28 of the cooperating stub shaft 26, and carries thereonthe inner race of a ball bearing 4Q, the outer race of which is pressedinto the "socket r28.k By means oftliis construction the impeller's arerotatably supported uponthe shaft'membersl35, and because of theVconstruction shown,'the mechanical resistance to freeturning is veryslight. As a` consequence the. iinpellers turn freely, and under averysmall differential pressure, which-isdesirable inthe metering of gases,particularly low pressure gases.

T hefsocket 28 has positioned therein a plate 42, rone face of whichrests against the shoulled opening 43.

der 29, `and the other'face ofrwhich rests against the outer race Vofthe ball bearing lO. This plate 42 is also providedwith a thread- Y*lihen it is desired to pull 4the ball bearing for any reason, the shaftmembers 35 having been firstk removed, a puller bar vis threaded intothe opening 43 "whereupon the platel-2may be-'easily withdrawn from thesocket carrying ,the ball bear` `lngmembers with it.` f

Mounted upon the 'enlarged endof each of the stub shafts 26, and fixedtothe shaft to rotate'therewith is a timing gear 50, of suitableconstruction. VPreferably there are two sets ofthese timing gears, apair at each Vend of the device, and'they are so set as to mesh witheach other,'to insure rotation of the lobedimpellers indefinite timedrelation with eac-h other. lf desired the timing gears may be cut toprovide backlash, and the gears at one yend of the casing are settolprovide backlash in one direction, the gears at the other end of thecasing having backlash in the other direction and being thus set againstI eachother to compensate for' this backlash. yThismethod of setting thegears permits of securing quiet ruiming gears without the Supported uponY necessity of nice'mechanicalfinish for the gears.

ing gears upon the stub shafts 26 may be used. Asshown, however,'thesegears are mounted uponthe stub shafts, with their inner `faces bearingagainst flanges 5l, carried by the stub shafts. Each gear is providedwith several bolt receiving passages 52, for

receivingcap screws 53 which'v are threadedV iny cooperating threadedpassages 'in the iianges 5l to hold the timing Vgears against axialmovement on the shafts. The passages 52 yare larger than the screws`53jso that the angular setting of the gears may be varied.

find Va plurality of aligned passages 54 and 55, in thek gears andiianges 5l respectively,-

are provided toreceive taperv pinsk 56 by means yof which the lgearsmaybe `locked in any desired angular setting. In this way the Anysuitable method-of mounting the tim gears maybe set 'against each othertocom-VV pensate for backlash, set out above. p

As vshown 'the `timing Vgears are mounted directly over the supporting.bearings'which vgreatly reduce the objectionalfrictionalforces,.strains, etc., during operation and mits of a lighterconstruction.

Also carried by'one ofy thestub shafts26 is a. small gear 5'?. As shownthis gear has an yaxial opening therein to receive ther stub pershaftand is bolted-to the cooperating face of' the timing gear on the samestub shaft.

A suitablecover plate k58v isc'lamped or bolted to the open end of eachofthe socket members to close the'end thereof and hold the ball bearingin place." 4The innerfface f inner end of which ring V.presses againstthe outer race of the rball bearing, .the cover 58 thus serving, when itisV clamped in position, to force the outer race of the ball bearingagainst the plate '42,fandthus hold the entire ball bearingassembledagainst longitudinal movement within the socket 28.

kof each cover plate 58 presses against a ringV 59, mounted withinthesocket or bore 28, the

,Each shaft member Y35 is preferablyprof 'a result there is atendencyfor grease to leak out from around the ball bearing, rather than forimpurities to leak in around the vball bearings, and the passage ofobjectionableimpurities intothe ball bearings withresultant damage tothe-ball bearings is thus effectively prevented. With many fluids, suchfor instance as ordinary city gas, the amount of objectionableimpurities in thefgasv is very small.

"Hdweverpwith some gases, such for instance "afsrrcoke Coven gas'jesfaconsiderable quantity 'o'ffta'rfcoke breeze V"andi-the like is lpresentyin ',theifgasjand j these impurities tendV to work ifntojthe-bearingsand wear them out yvery rapidly. Butf with the4 construction shown lthisobjectionable conditin will ynot arise, inasmuch as the grease suppliedthrough ,the

,I'passagel'tends to work-through the beari ing and' out of the socket28, thus preventing 'impuritiesfroin working intothe bearings. The'flangev 60,"`the.fcooperating lspaced' ini v@turned flange 62, on' eachof the'rings 59, land V`Vthe" co'verplates581cooperate together to forma tortuous-passage which retards the escape of grease and providesanarrow passage 'fwhich is at alltimes filled with grease, to jjfpreve'ntithe inward movement ofimpurities.

Each f end. plate surrounding each opening 2"@ '"21nis iprovidedfwith4al groove 65, which is Yin open connectionwith theopening 21. Each'.groove*65"i`s` "connected by means of a suitj"ablefpassage66 toapressure grease connect- 3 ingcuplirigor attachment 67, which may 'lioi ,bei of any suitable ycharacter adapted kto cooperate iwithja'nordinarygrea'se gun or supply coupling. This construction is such that"grease under pressure may be introduced-into 'thiefgroove"65-,whichgrease tends to escape Iinfb'o'th :directinsff'ron thelgroove andfthusto; aidf in preventing the movement of thrbugliy the opening 21along the lReferring'[particularly*to Figs. 2, 4,-and

*5 the` ,ear-57 is -'indriving connection with gr'O, ywhichgearismounted upon a" shaft "shaft-'712i 'This 'shaftf71 ha'smountedthereon, intermedi-ate its l'e'ngth,fav worm A75, ,which imesheswith' acorresponding worm gear V76, 'whichis inturn mounted upon a verticallyjarran'ged shaft 77, which shaft vis 'suitably supportedin. a*yverticallyv arranged passa ein v"thesupporting member72. This-shaft 7issupported infree driving connection "by .upper "andrlowe'r ball bearings,78 and '79, the yupperball` bearingsxbeingheld in place by meansiof acover 80, which'is bolted or otherjwise suitably secured tothesupporting member 72. This cover 80rhas. an upwardly eX- i *tendingflange 81, theupperend of which is tapered. .i Cooperating vvviththecover 80 is a l packing ,housing 7,83',- 'having a packing 84 thereimanda lp a'cvkinggland 85, which may h'eforced against the 'packing in anysuitable v"manner, to provide aft-ight'joint` Theinner 'enddffthepacking. member 83 is of'reduced l.""diaineter, to provide `agrooved shoulder f 86, .f "`tl1'"e""groove`86""being'adapted''ocooperation 'with'ithe' tapered rlangeiSl duringmachining 'operation of'these'parts, to insure operative alignment sothatthe several parts may be Kbored and 'machined' together, vand willlproperly y'align when `thereafter assembled.

Adapted for positioning within the shaftreceiving passage of the covermember 80 is a collar v87, which 'is pinned tothe shaft 77, andf bearsagainst the ball bearing 78, to hold itinposition This collar issurrounded by the grease-receiving space 88.

Theflange 890i the packing member 83 is adapted to receive bolts or anyother suitable means for holding itinposition.'

The upper end of the shaft 77 is connected to suitable register orrcounter mechanism designated ygenerally by the numeral 90, theparticulary construction of which is not shown, but which may be of anysuitable and'usual construction. 4

Inasmuch a-s the impellers must necessarily lhavey some slight clearanceywith respectlto the impellerhusing in order to permit frei` movementthereofslippag'e of the fluid being metered pastthe imp'eller ordinarilyoccurs. lf the differential `pressure across the impellers is known,however, this slippage may be readily allowed for or the counter may be`calibrated to compensate for this slippage. 'ln order to show thisslippage a suitable dif 'l s ferential pressuregauge 95, which maybe ofany suitable construction, is provided, this gauge being connecteddifferentially to opposite sides ofthe lob'edrotary elements so as totransfer the pressure adjacent the inlet `and the outlet portions of themeter to the gauge,v`vhich indicates the slippage softhat`the-'readingsofthe counter may be corrected -to compensate forthisslippage. f

As shownone end of the shaft 71 has the gear 7 0 mountedthereon. Theother end is provided with a slot 100, for receiving a suitablecrank,whereby the shaft 71 may be manipulated as desired. It sometimes happensthat wherexgases of very low pressure are being metered, thedifferential pressure .across the impellers 1s not sufficientto'overcome the inertia-ot the parts and start the meter. Under suchcircumstances the crank may be applied to the outer end of the shaft f71 so that the' meter may be turned over by hand. Furthermore inassembling, the crank may be used to turn the impellers so as toposition the timing gears thereon to insure 'assembling with theimpellers in proper time.

Each end plate 20is provided with an outywardly-extending flange 105,which extends sufficiently to completely overlie the geary mechanismthus fardescribed. Each flange is-also provided with a cover plate 106,which is arranged to be clamped, gas tight, against the free end of theflange. Consequently the gears are maintained in a chamber orYVhousingwhich is sealed against leakage to the EV outside. But it isnecessarylthat access may Y bled itextendspartly into and partly refVceives the outerend ofthe supporting mem.-

behad tothe shaft 7 -1l from outside this housing. r-r-is shown,particularlyin Figf, one.

of the cover lplates 106 isprovided with.y an opening 10'? whichreceives one-end of the supporting member 72. 1t also receives aiianged'sl-eeve,108,`which is adapted to enclosethe outer end of theshaft 71 and` to be` bolted or otherwise Vsuitably secured to the coverplate r106'. The vinner end '109. of this sleeve 108 is extended so thatwhen assems ber 72as indicatedin Fig. 5. This inner er:L tendedfendfisjalso provided witha shoulder 1,10, adapted to -cooperatewiththe freeend ofthe supporting member to compress a packing 111 therebetween, vtoprevent leakage between the outerface ofthe sleeve108' and the outer endof the supporting member 72. The

passage withinthe sleeve 108 is enlarged, at the inner end to'receive vacompression sleeve f on theouter end of the sleeve 108 to complete# f Y.ly close off the outer end of the passage through the sleeve anditocover .the'outer end*k lof thev shaft'71, whenthe startingV cra-nk isacasing havingl a' fluidfpassagetherein, a l

115, the inner en'djof which rests 'against the outer'ball bearing forthe shaftfl and the outer end of whichrests 'against a packingk 116,which surrounds the shaft 71 and is pressed against a shoulder 117,within the kpassage'w'ithin the sleeve 108 along the kshaft 71,.` v Thesleeve 108 is provided with Va cap 120 which is preferably 'threadedlymounted not in use.

' The sleeve 108 is providedl with a lubricant y assao'e 125 havin alubricant attachment p C 7 `126, by meansofwhich grease maybe introducedunderpressure into the enlargedinner end of the passage in theA sleeve108,' and thence into the interior of the supporting member 72. Thisgrease is introduced under f pressure and therefore tends towork out lofpassage Yof objectionable impurities into the,

the supporting member, through the. inner ball bearing, and so into theinterior of the gear housing chamber. Asa consequence the interior ofthe supporting` member is pre- Y vented.

ation, within the gear chamber to immerse the Lubricating oil ismaintained, during operlower portions of the timing gears and thusprovide lubrication.

In Fig. 6 is shown a slightly modied form of actuating mechanism for.the counter in which beveled gears 150 and 151 are used in place oftheworm and helical gears as shown in the modification illustrated in`Figs. 4c and 5. In this 'construction the supporting member 72isprovided with a cap 80, vwhich has a considerably elongated extension 81for supporting the shaft 7 7 C, Suitableball bearings 78 and 79 areprovided atthe upper and lower ends respectively of this cover eX-tension, suitable packing preferably being positioned above theA upperball vbearing to make a tight joint. The sleeve108is providedwith'atpassa-gel 125', having'alnbrii cant attachment 126 similartotheattachment 67 vat thefouter end, theffunctlon of which isexactlythe same as theeorresponding passager described above inconnection with Figst and-5.

- While Vthe forms `of ,apparatusherein l'de-V .scribed constitutepreferred embodiments vof the invention, Ait isrto be understood thatthe Y invention isnot limited tothesepreeise forms of apparatus, andthat.changes may be made rtherein without departing from ther scope of theinvention whichis deiinedinthe append-y sek 1. A yiuid handlingapparatus ,comprisingi 1 a casing having a iiuid passage therein, arotor disposed in said passage and adapted tocofY operate with the fluidtherein, a supporting means,*anda shaftextendingifrom said suprportingmeans for' rotatably support-ingv said rotor, and means on said rotor'surrounding said shaft in bearing relationship therewith.

2. A fluidhandlingY apparatuscomprising l a casing havinga fluidpassagethereim a to cooperate with the'vfluidtherein, a supportingmeans', and a shaft extending fr omjsaid supporting meansforrotatablysupporting'V saidy rotorpand meanson the rotor `having asocketed vbearing connection with the shaft. 8. A fluid handlingapparatus comprising rotor disposed4 inY saidpas's'age and adapted tocooperate with the .fluidthereim meansfor rotatably supporting saidrotorfsaid means lrotor disposed in saidfpassageand adaptedcomprisingfan inwardlyextending shaftprojecting toward the.saidwfluidpassagd and means onsaidfrotor providing a lubricantcontaining f, ,chambers adapted to receive said shaft inbearingjrelationship therewith, said i i i shaft havingrneansassociated;therewith4 for shaft in hbearing relationshiptherewith. 5. Ina fluid meter, a casing havingjajfiuid passagethe'rein,a Vrotor disposed in said pas'- sage and adapted to be aotuatedby the'fluid passing therethrough, anend platefor said easing, and means forrvrotatablysupporting said rotor ontheexterior-of said endvplate,

said means comprising ashaft member, any .outwardly facing cup membercarried by said rotor and surrounding the end of said Vshaft member,Iand y antifrictionr means interposed `cup means on 'said rotorsurrounding said "40s u a casing,`said meansy comprising short shaftsybetweensaidrcup member and said shaft memy er; v

3 yIna fluid` meter, acasing havinga fluid l passage thereima rotor'disposed in said paspassing" therethrough; all @11d sage and adapted tobe actuated bythe fluid l plate yfor said casing, and means Vforrotatably supporting 'fsaid rotorex'teriorlyof said end plate, said 1pcarriedv by said rotorv meansfcomprisingV a shaft extending towards saidrotor, any,outwardly `facing cup member and surrounding theinwardlyext'ending' end'of said shaft, anti- Y theV fluid passingfriction, means interposed betweeiisaid cup member'and said shaft, saidshafthaving nieansassociated therewith for supplying l'vbricant toV saidcup member and anti-friction means. v Y v 'y 'LA VVfluidhandlingapparatus comprising a casing having a fluid passage therein, a pair oflobed rotaryi elements mounted within said passageand adapted tocooperate with therethrough, shafts for said` rotaryelements extendingthroughy the end' wallsof said casing, and means forrotatably supportingsaid rotaryelement shafts on the exterior of said casing,"said vmeans lcomprising a shortshaft member positioned shafts and in ateachendgof-,each of said rotary element alignment therewithrespectively, and means 'on each said rotary element memberfin bearingrelationship therewith.

8;-In a fluid meter, acasing having a'iiuid passageV therein, a pair oflobed rotary elef adapted to be actuatedr 'by therethrough, shafts forsaid rotary elements extending through the end ing, and means forrotatably supporting said' and anti-friction` Ymeans lments mounted'within said passageand they fluid passing walls of saidcasrotaryeleinent shaftson the 'exterior of said positionedone at'eachend'yof each oflsaid rotaryelement shafts and in align-nient therewithrespectively, said rotary'y element shafts having outwardly facing cupsat theends thereof said sliortshafts, interposed rbetween each rotaryelement'shaft and its cooperating short shaft.

of surroundingtheends .y 9. A fluidhandling apparatus comprising y, amain casing having Ia fluid passage therein, i farvirotor within saidpassage adapted to co- "operate with'the fluid therein, said rotorhaving a part thereof extending through the end lwallof'said casing, andmeans formingan externally gas-tight compartment enclosing the extendedend of said rotor, and means in said-compartment for rotatablysupporting said rotor, said last mentioned means comprising an inwardlyextending shaft pro- "Qjecting toward the said rotor, said partsurrounding the projecting end of said-shaft in Y bearing relationshiptherewith.

1 10.d A Huid handling apparatus comprising fa main casinghavin'g afluid passage therein,

y operate'withl-the fluid therein, said rotor having a part thereofextending throughthe end wall ofsaidcasing, means formingan externallygas-tight compartment enclosing the extended end of said rotor,`nieans'in said compartment for rotatably supporting said rotor, saidlast-mentioned means comprising a shaft, said part providing alubricant-containing chamber ladapted to receive said shaft iii bearingsupporting relationship therein, said shaft having means for supplyinglubricant to said chamber. l1. A fluid handling apparatus comprising acasing having a fluid passage therein, a rotor within said passage andadapted to cooperate with the fluid therein, a rotor shaft extending tothe exterior of said casing, said roto-r shaft and casing having alubricant receiving groove therebetween for substantially preventingfluid leakage from the casing past said rotor shaft, and having meansfor supplying lubricant to said groove. k

l2. A fluid handling apparatus comprising a main casing having a fluidpassage therein, a rotor within said passage and adapt-ed to cooperatewith the fluid therein, said rotor having a supporting shaft extendingto the exterior, of said casing, a substantially fluidtight compartmentsurrounding said rotor shaft, bearing means within said compartment forsaid rotor shaft, and means for substantially preventing leakage betweenthe interiorof said casing and said compartment, said means comprising alubricant groove formed in said casing and surrounding said rotor shaft,a lubricant passage communicating with said groove and leading to areadily accessible point on the exterior of said casing,

and means associated with said passage for receiving pressure lubricantsupplying means.

e e 13. Afiuid handling apparatus comprising a casing having afluidpassage therein, a pair of e and having supporting means progectingthrough the end walls of said casing, 'and lobedrotary elements mountedltherein ico means for rotatably supporting said supporting meanscomprising a pillow block at each end of said casing, each pillow blocksupport- ,o i

for rotatably supporting said shafts comprising a pillow block at 'eachend of said casing adapted to support the shafts ofboth of said rotaryelements, said pillow lock being detachably connected with the exteriorof said main casing, and means providing a l Till 1 bloei-z" and thecooperating lconnection Y between saidY rotor and carried by saidstandard in alignment with said rotary element shafts respectively, and

` element shafts surmeans on said rotary rounding the ends of said shaftmembersin bearing relationship therewith. o j Y 16. A uid metercomprising a casing having a fluid lpassage therethrough, a rotor insaid passage adapted` to be actuated by the fluid passingtherethrougln'a counter mechanism adaptedto be drivenfromsaidrotor, adriving connection between said rotor Vandv saidcounter mechanism, saiddrivingconnection including a drive shaftoperatively connected with saidrotor,"a counter shaft connected with said counter mechanism, co-

operatinggears on said driveshaftvand said counterfshaft respectively,said drive shaft havingprovision whereby vit maybe manually actuated tothereby attuate said rotor.l 17. A fluid meter comprisinga .casinghaving aifluid passage therethrough, arotor in said passage adaptedto beactuated by the fluid passing therethrough, said rotor` havingan'extension extendingthrough the end lofsaid casing, a substantiallyfiuid-tight compartment. surrounding thev extendedy end a driving' saidcounter mechanism, saidV driving connection including a drive shaftconneotedwith said otor within said compartment, said drive shaftextending through thewall of said compartment tothe yexteriorthereof forof said rotor, counter mechanism,

-manual operation, said compartment .hav

a casing having a `fluid ing, means forsupplying lubricant to saidydrive shaft' to prevent fluid leakage to the f exterior of saidcompartment past said drive shaft.V i ,i

18. A fluid handling apparatus comprising passageztherein, 'a rotordisposedin said' passage andadaptedto cooperate with the fluid therein,said rotory having a 'supporting'` member extending through ythelendwall yof sai'dfcasing,`means l for rotatably supportingthe extendedvmem-v i berof said rotor, said means comprising a short" shaft, cupmeans carried by the ex-V tended member of said rotorA and surroundingsaidshort shaft in bearing relationship therewith, and a gear carried bythe extended Y.

'areas-ia' i member of said rotor and surrounding' bearing support..y

1a A unaV handling apparatus Comprising a casing-having afluidpassagetherein, Y r f a pairlof Vlobed rotary elementsz mountedvtherein and adapted-to be actuated bythe fluid passing' therethrough,shaftsv for 'said rotaryV elementsextending through the end walls ofsaid casing, p

tatably supporting said rotary element shafts on the exterior of saidcasing, and intermeshing, gears carried kby said shafts, eachlfo'fsaidgears surroundin'gtl'ie loe'aring means of its respective shaft? f v120. A' iiuid handling apparatus" of' the class described comprising acasing 'having a ypassage therethrough, a rotor in saidpassageadaptedfto; cooperate with the iuidV therein, tending through theend of said casing, a substantially fluid-tight compartment surroundingthe' end of said rotorlextension, ta

starting drive shaft in said compartment yand extending to the exteriorthereof through an outer wall Vofy vsaid co'mpa' r`t1nent,y drivbearingmeans` for rov saidrotor having an extension exing connection'vforsaid-fstarti-ng"V drive shaft continuously Vin. driving engagementy withsaid rotor, packing'means in the outer wall of vsaid compartment forsaid startingdrive shaft, and a cover platecovering the outer end ofsaid starting shaft tonormarlly pre- Vent all'leakage `through saidvpacking.

21.7A fluid handling apparatus ofrlthe :class described comprising acasing Ahaving a'fluid passage therein, a rotor-within said passageadapted-to jcooperate withjthe fluid i therein, said rotor having avsupporting shaft extending tothe exterior ofsaidfoasing,a substantiallyfluid-tigl'it compartment surroundingthe extended end ofsaidrotor shaft,

'supporting' means-in saidcompartment in' bearing' engagement withsaid'rotor shaft,A said casing having a lubricant groove surrounding therotor shaft substantially pre'- venting leakage between the-,finteriorof said casing and said compartment havinga passage forsupplyingfjlubricant 'to said groove, and a'gear fixed vto saidrotorshaft yand provided in saidA compartment lbetweenl saidy supportingmeans and said lubricant groove..V

signature.

zleo

lis y r11-testimony whereof rasta-0' @ne my; Y

